[tex]f(x)=0\Rightarrow-\frac{4}{3}x+4=0\Rightarrow x=3\\
\Rightarrow G_f\cap O_x=\{A(3,0)\}\\
f(0)=4\Rightarrow G_f \cap O_y=\{B(0,4)\}\\
\text{Distanta dintre punctele $A$ si $B$ este: }\\
AB=\sqrt{(x_B-x_A)^2+(y_B-y_A)^2}=\sqrt{(0-3)^2+(4-0)^2}=5[/tex]
